Having or showing a perceptive understanding or insight; shrewd. Her acute awareness of the situation helped her make the right decision.
(of a bad, difficult, or unwelcome situation or phenomenon) present or experienced to a severe or intense degree. The acute shortage of water in the region has led to severe restrictions.
(of a physical sense or faculty) highly developed; keen. Dogs have an acute sense of smell, which makes them excellent at tracking.
(of an angle) less than 90 degrees. The triangle has three acute angles, each measuring less than 90 degrees.
(of a disease or its symptoms) characterized by a rapid onset and/or short, severe course, as opposed to chronic. The patient was admitted with acute appendicitis requiring immediate surgery.